Steering wheel mounting assembly

摘要

A steering wheel body (1) has covering materials for covering a ring core (5) and spoke cores (6) and a pad member (3) integrally formed with the covering materials. An adaptor (40) is fitted to the tip of a steering shaft (30), the adaptor (40) having an inside serration (41) engaging with the serration (32) of the steering shaft (30) and an outside serration (43) engaging with the serration (20) of a boss member (18). Moreover, the boss member (18) of a boss plate (10) is provided with a through-hole (21) extending in a direction perpendicular to the axial direction of the steering shaft (30). A bolt (25) for fastening the adaptor (40) of the steering shaft (30) is screwed into the through-hole (21).